Just got scammed by B 3 s t (B-3-s-t)

I was reading a thread earlier today about a guy selling a Main, in game its name is durials321, i traded 07 Gold for the account (to his account in game named: "im mattiesh" and it was not a legit trade, i put in quite a bit on money i went about 3/4 after hours of thinking it over, now i am left here with pretty much nothing.
He was not a fully trusted member and thats probably my fault.
Everyone can go to the thread he had going

http://www.sythe.org/runescape-2007...123-max-combat-quest-cape-firecape-torso.html

This is what i was scammed for.

His skype was "B3st99"

 

http://www.sythe.org/report-scammer/1644044-how-report-scammer-report-templates.html
http://www.sythe.org/report-scammer...skype-scam-reports-must-contain-sythe-pm.html
http://www.sythe.org/report-scammer/1331084-attention-all-skype-proofs-must-include.html

If you can get the required proofs we will work together to move towards a ban.

 

What would i need exactly, im kinda new?

I have all our chat log and purchase of the gold and the amount that i have left after i was scammed.

http://imgur.com/a/aykJN#0 - these are the photos of chat screenshots and his names, he deleted his skype account from his actual account that he was using on sythe this morning.

I also have proof and confirmation of the amount of money i bought and paid to give to him for the account if needed.

 

I'm sorry we need said screenshots uncropped.
If you have the time, please do re-upload them and you can make a new report in this section.
Thanks!